Four methods to quickly induce vomiting in cats include:
1. Use hydrogen peroxide. Mix it with water in a certain proportion and slowly inject it into the cat's mouth with a syringe to stimulate the stomach and induce vomiting.
2. Use salt: Dissolve salt in warm water and then drip it into the cat's mouth using a syringe.

3. Use herbs such as plantain to make a decoction and give the cat a small amount to drink to induce vomiting.
4. In special circumstances, vomiting can also be stimulated by quickly feeding food such as raw meat or cat food.